The Fiat 93163393 is a genuine OEM nut designed for use in ZF gearboxes. This essential component ensures secure fastening within the transmission system, maintaining structural integrity and operational reliability. It is specifically compatible with Fiat 315 tractors and various Iveco vehicles, serving as a direct replacement for part number 1290343021 from ZF and 93163393 from Iveco. Manufactured to original equipment specifications, this nut guarantees optimal fit and performance in demanding agricultural and industrial applications.